Android Question Scrollable webview

I am trying to modify BetterSlidingPanels by using webview. But due to some reasons I am not able to make the webview scrollable. But it works when i touch and scroll the panel. Can any one help me in this regard?

https://www.dropbox.com/s/dlsg3eqzp3xzg4y/BetterSlidingPanels webview.zip?dl=0